Dark Matter (2024 TV series)

Jason Dessen, a high school physics teacher lives with his wife Daniela and son Charlie in Chicago. When his friend Ryan wins the prestigious Pavia prize, Jason attends his celebration at a local bar. As he's walking back home, he is held at gunpoint and abducted by a masked man who takes him to a building site, forces him to remove his clothes, surrender his phone, and then injects him with an unknown substance which gradually renders him unconscious. When he awakes Jason finds himself in a laboratory facility (Velocity Labs) where he meets lab psychiatrist Amanda Lucas and Velocity CEO Leighton Vance — who he recognizes —, both of whom are delighted that he has "returned". Uncertain and disoriented Jason escapes the lab and returns home, where he meets Amanda again who says she lives there with him—the interior décor of the house is completely different, and there is no sign of Daniela and/or Charlie. Meanwhile, Jason's abductor is revealed to be a version of himself, who enters his house and seduces Daniela.

Jason #01 checks himself into a hospital where he learns that he's a world-renowned physicist who hasn't been seen in public for over a year and that there is a mysterious drug in his system. Escaping impending psychiatric confinement, he manages to track down Daniela — who's now a successful artist — at her latest art exhibition. She tells him he (Jason #02) approached her before his disappearance and confided in her his regret of ending their relationship long ago and the possibility that she would never see him again. Despite being puzzled & concerned Daniela agrees to help him figure out the discrepancies. He realizes the paths between the Jasons diverged when Daniela became pregnant, where Jason #01 decided to stay and Jason #02 decided to leave. Despite initially struggling Jason #02 settles into his blissful life with Daniela & Charlie.

Dawn (Velocity security) forces into Daniela's condo, kills her, and captures Jason #01. He agrees to work with them claiming he wants to regain his memories. Jason #01 studies Jason #02's research and realizes he discovered a method to travel between alternate dimensions first by using a chemical compound to inhibit certain areas of the frontal cortex and then using a large metal box which induces a state of superposition in its interior to travel between realities. Jason #02 becomes uneasy about Ryan's presence at his house while Jason #01 tries to procure more information about their research from the other Ryan.

Soon Jason #01 is discovered as an imposter by Leighton who tries to force the truth out of him, and Ryan is implied to be killed. A sympathetic Amanda breaks him out of confinement hoping to send him back, but when they're discovered they both enter Jason #02's metal box intending to flee. Inside they inject the chemical compound and find themselves suddenly transported to a long corridor with doors on either side. Leighton soon follows them into the box. Jason #02's sudden change in personality is noticed by Daniela, but he attempts to pass it off as due to clarity obtained as a result of a near-death experience.

Jason #01 and Amanda find themselves in an infinite corridor with doors leading to infinite alternate realities. They use the ampoules and go through numerous doors hoping to find Jason #01's reality, but all the worlds they visit turn out to be desolate and ruined. They find themselves in a frozen Chicago, where after rescuing Amanda from a blizzard and while recuperating the pair realizes that the doors somehow respond to their overall mental state when opening them. Jason #02 abruptly quits his job and approaches Leighton of that world in hope of procuring funding. After Jason #02 previews the box's capabilities and explains its function, Leighton agrees to pay Jason #02 a large amount of money in return for providing him with ampoules. Daniela & Charlie discuss Jason's (Jason #02) sudden change in demeanor after he missed their deceased son's (Max) remembrance while Jason #01 & Amanda bond inside the box.

Jason #01 and Amanda enter a world where Blaire from Amanda's world, who went missing after volunteering to enter the box some months ago resides. She reveals that despite living in a world riddled with constant danger, she does not want to risk going back into the box until she's ready as she believes it's nearly impossible to find her true reality. Despite trying to keep their intentions clear and emotions under control when opening the doors, Jason #01 & Amanda continue to find themselves in uninhabitable and hostile worlds. They visit a world that's engulfed by a deadly plague where Charlie is dead and Daniela is dying. Next, they visit one in which Jason is an incarcerated criminal where upon visiting his home he gets the police called on by Daniela and then assaulted by Charlie.

Jason #02 reveals to Daniela that he quit his job and encourages her to do the same. She begins to feel left out of their marriage. To secure Leighton's funding Jason #02 visits his world to grab ampoules and learns that Jason #01 & Amanda escaped via the box.

Jason #02, not knowing about Charlie's nut allergy, accidentally feeds him nuts. At the emergency room, Daniela notices needle marks on Jason #02's arms and begins to become suspicious of him. She tracks him to his storage shelter, finds the ampoule he uses to travel between worlds, and enlists Ryan's help in discovering what it is. Ryan believes that Jason is competing with him on the compound. Jason #02 shows him how to travel between worlds but leaves him in an alternate Chicago after Ryan realizes he is not the Jason he knows.

Jason #01 continues to travel between worlds and begins to grow closer to Amanda. He struggles with his anger and jealousy towards different versions of himself who are able to be with Daniela.